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Hex to Binary Converter

Enter a hexadecimal value to instantly convert it to binary, plus decimal and octal outputs.

Last updated: May 30, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution

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What is Hex to Binary Converter?

Hexadecimal (base 16) uses digits 0–9 and letters A–F to represent values 0–15 per digit. Since each hex digit maps to exactly 4 binary bits (a nibble), the conversion between hex and binary is straightforward and lossless.

Each hex digit corresponds to a 4-bit binary group: - 0 → 0000, 1 → 0001, ..., 9 → 1001 - A → 1010, B → 1011, C → 1100, D → 1101, E → 1110, F → 1111

For example, FF: - F → 1111 - F → 1111 Result: 11111111 (binary) = 255 (decimal)

How to Use Hex to Binary Converter

1

Type or paste a hexadecimal number in the input field (with or without 0x prefix).

2

The binary, decimal, and octal outputs update instantly.

3

Click any copy button to copy the result.

4

Click "Load Sample" to see an example.

Common Use Cases

  • Reading and interpreting hex values in Wireshark packet captures.
  • Converting memory addresses from hex dump output to binary for bit-level analysis.
  • Debugging embedded systems where register values are shown in hex.
  • Computer science coursework on number systems and digital logic.

Example Input and Output

The hex value FF (or 0xFF) converts to binary 11111111, which is decimal 255.

Hexadecimal
FF
Binary
11111111

Data Privacy

All conversions run entirely in your browser. No data is sent to any server.

Frequently Asked Questions

Why do hex and binary convert so cleanly?
Because 16 = 2⁴, each hex digit maps to exactly 4 binary bits. This 1-to-4 correspondence means you can convert by substituting each hex character with its 4-bit equivalent without any arithmetic.
Can I enter lowercase hex letters?
Yes. The converter accepts both uppercase (A–F) and lowercase (a–f) hex digits.
Does this handle very large hex values?
Yes. BigInt is used internally, so there is no size limit beyond available memory.

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